How mich privacy do you want?
Much? Don't use Apple. It is worse than Android. Google Android is bad as well but you can make substantial changes. Beste would be a custom ROM but that's an extreme change and way
You don't want to change iOS? You have to get rid of many Apple apps but I guess, it's not possible.
So remaining: AppleTV, Spotify, Netflix, Amazon, defenitely Discord!, WhatsApp, YouTube, Telegram, definitely HuawaiHealth.
Some of the others I don't know but I'm sure they should be avoided as well. Use Websites with blockers in browser instead of apps.
That is the least to do or accept beging heavily tracked